Hose



Patented Jan. 17, 1939 BOSE Ernst Baumgratz, deceased, late of Stuttgart, Germany, by Emma Baumgrata, ne Friedhofs. Stuttgart, Germany." solo representative o! the heirs, assigner to Robert Bosch Gesellschaft mit beschrnkter Hartung, Stuttgart, Germany Application March 10, 1937, Sertal No. 130,213 In Germany March 14, 1986 2 Claims. (Cl. 13B-49) The present invention relates to a hose for conveying spraying material, which is to be conveyed from a pump to a freely movable hand spraying piece, and consists in the feature that 5 this hose is combined in such a way with a Bowden wire control for instance for adjusting the delivery amount of the pump from the hand spraying piece, that the Bowden wiresheath is` embedded in a corresponding recess or groove 10 in the hose.

One example of construction of the present I invention in diagrammatically shown in the accompanying drawing, in which:

Figures 1 and 2 are, respectively, a cross seclo tion and a longitudinal section through a hose having a recess. but without the Bowden wire laid therein.

Figures 3 and 4, on the other hand, show a cross section and an elevation oi' a hose with the $0 inlaid Bowden wire.

Figure 5 shows a particular modeA oi arrangement of the Bowden wire.

In these ngures. I denotes a high pressure hose of rubber, in which a cotton insertion 2 for 25 strengthening the hose is embedded. 0n the periphery oi the hose a groove I is formed, which runs in the longitudinal direction of the hose and lies parallel to the core of the hose.

In Fig. 1 the sheath of the Bowden wire as it I0 comes to lie inthe groove 3 is indicated in chaindotted lines.

In Figs. 3 and 4, the Bowden wire is shown laidin thegroove 3T, and together with" the hoseV I, is lapped round by a wire helix I. 'I'he turns lo oi' coils oi this wire helix are so spaced from each other, that the hose with the inserted Bowden wirecanbeforcedthroughbetweentwosuch paratus.

turns, owing to the possibility of sprinily bending the turns apart. In these circumstances, the hose and Bowden wire can be conveniently threaded at the same time into the finished helix, by the parts to be lapped round being introduced through between the coils into the helix by steadily revolving these parts with the helix.

Diilering from the example of construction shown in Figs. 1 to 4, in the construction shown in Fig. 5 the recess for the Bowden wire. and thus l this latter itself may be carried as a helix round the core oi the hose, and isthereby given a somewhat greater ilexibility than the structure consisting of the hose I, the Bowden wire 4, and if required the wire helix 5.

What is claimed is:

l. A hose for conveying spraying material from a pump to a freely movable hand spraying apcomprising a rubber hose having a groove in the periphery thereof, a Bowden wire remote control consisting oi a core movable within a sheath, at least a part oi the periphery oi' which, in section, is of similar cross section to' that of said groove and is housed within said groove, and a wire helix wound around said hose and said Bowden wire sheath for retaining said sheath in said groove and for stiiiening said hose as a whole.

2. A device of the character prising a rubber hose provided tudinaliy extending peripheral groove, a Bowden wire mounted in said groove. and means for holdingsaid- Bowden wire in said-groove.

described com- EMMA BAUMGRATZ, nsf FRIEDHOFER. Sole Representative ol the Heirs of the Estate ol Ernst Baumgratz, Deceased.

with a iongio 

